Nut-lock.



No. 640.438. Patented Jan. 2, B900. E. A. BLNTON, 1R.

NUT LUCK.

\Applcation filed Sept. 24, 1898. (No Modem 2 Sheets---Sheet 2,

@Hummm ilDlVilltli ji. BLANION, JR., OF RIDL'EY PARK, PENNSYLVANIA.

SPECIFOATON forming part of Letters Patent No. 640,438, dated January 2,1900.

Application iiled September Z4, 1898. Serial No. 691,790. (No model.)

To al?, whom r' mmf/y concern:

Be it known that l, EDWARD A. BLANTON, Jr., a citizen of the UnitedStates, residing at Ridley Park, in the county of Delaware and State ofPennsylvania, have invented certain new and useful improvements inNut-Locks, of which the following is a specification.

rlhis invention relates to certain new and useful improvements innut-locks, having for its object to provide simple and effective meanswhich may be cheaply and expeditiously manufactured, whereby bolts andtheir nuts may be securely held against relative movement when adjustedto secure two or inore parts together.

lilith this object in view the invention consists in the novelconstruction and combination of the parts hereinafter fully set forth.

ln the accompanying drawings, forming a part of this specification, andin which like letters and numerals of reference designate corresponding`parts, Figure l is a side elevation of a bolt with a nut and a lockingdevice applied thereto and shown in section. Fig.Y 2 is an end view.Fig. 3 is a perspective view of the parts disconnected, part of the boltbeing broken away. Fig. Li is an end view of a modified forin of theinvention. Fig. is a sectional view thereof, and Fig. 6 is a perspective view of the nut and locking-piece.

Referring more particularly to the drawings, A designates abolt,which1nay be of any7 usual construction and dimensions and havingthe usual threaded shank l. At its end the shank is formed with one ormore bosses or wedge-shaped portions 2, extending longitudinally alongthe shaft for a short distance. As shown, there is a series of thesebosses arn ranged circulnierentially around the end of thebolt-shank,tlie bosses being equidistantly spaced or symmetricallyarranged. it will be understood, however, that the bosses inay extendonly partially around the end of the holt, and they Inay vary in nuniberto suit diiii'erent conditions. rFhe outer faces of the bosses arepreferably on curves having gradually-inereasin radii, Vnieasu ring rointhe center of the bolt, and said outer faces are either in the forni oftrue eccentrics or involute curves.

Adapted to he received upon the threaded portion of the boltshank is anut B, which may be of ordinary construction, having the usual pluralityof flat sides d, which in one embodiment of the invention constitutebearing-surfaces for an engaging portion of the locking-piece C. Thislocking-piece consists of an angular or circular plate formed with anopening 5, adapted to receive the bossed end of the bolt A, and in thesurrounding walls of said opening are formed one or more rccesses,corresponding in number to the bosses on the holt. The surfaces of theserecesses are curved correspondingly to the surfaces of the bosses of thebolt, but said surfaces are 6 inclined in opposite directions to saidbosses and are slightly longer than those of the said bosses in order toleave a small space between the thickened portion ofthe bosses and thecorresponding radial portions of the recesses. Atits edge thelocking-piece is formed with a lip or flange 7, extending at an angle tothe face of the locking-piece, and which is adapted to engage with abearingsurface of the nut when the parts are in their proper 7 relativepositions.

[is shown in Figs. l to 3, the locking-piece comprises a ilat angularplate, from one edge of which extends a flange having a dat face, thesaid flange being coextensive with any one 8 ofthe fiat sides 4 of thenut and beingadapted to overhang and closely conform to one of saidsides when the locking-piece is fitted upon the end of the bolt.

In Figs. et to 6 a somewhat different enibodi- 8 ment of the inventionis illustrated. In the construction shown in these iigures the lock--ing-piece C is substantially ringshaped and formed at its edge with anextension-piece 9, having an angular projection 10, which is 9 adaptedto be received into a recess 12, formed in the outer face of the nut,the walls of the said recess constituting the bearingsurfaces 4.

With the parts thus constructed and arranged, when the bolt A has beenpassed 9 through two or more parts to be connected the nut B is screwedupon the exposed threaded portion of the bolt-shank and tightenedagainst the surface of one of the connected parts. rlhe locking-piece Cis then slipped longitudinally upon the bossed end of theboltshank,andits engaging portion is brought into contact with thebearingsurface 4t of the nut, the frictional contact ol said locking-IOO piece and the nut and bolt serving to main-Y tain it from slippingoff the end of the bolt. If now any accidental turning of the boltshould take place, the locking-piece will be vlikewise turned by reasonof the engagement gagin g piece,holdi ng the nut B against fu rtherturning. It will be manifest that when it is desired to remove the nutfrom the bolt this may be readily accomplished by turning thelocking-piece C or nut B in the proper direcltion to loosen theengagement between the eccentric surfaces of the bosses 2 and therecesses, when the locking-piece may be slipped longitudinally upon andremoved from the end of the bolt.

From the abovedescription it will be readily apparent that a simple andexceedingly effective nut-lock is produced and one which may be cheaplymanufactured. It is not deemed necessary, therefore, to furtheremphasize the principles or advantages of the invention, as it isthought that they will be readily understood and appreciated by thoseskilled in the art. It will, too, be obvious that the invention issusceptible of a great many different embodiments and that variouschanges in the construction and arrangement of the parts thereof may bemade without departing from the spirit or scope of the invention,since 1. Inanut-lock,the combination with a bolt having a threaded shankand formed with a series of eccentric bosses having curved surfaces ofgradually-increasing radii, a nut provided with a bearing-surfaceadapted to screw upon the bolt,andalockingdevice formed with a series ofdepressions having curved surfaces adapted to engage and conform to thesurfaces of the bosses of the bolt and to permit a limited amount ofmovement between the engaging surfaces of the bolt and locking device inone direction, and also having an engaging portion adapted to thebearing-surface of the nut, substantially as described.

2. In a nut-lock,the combination with a bolt having a threaded shankformed at its periphery with a series of longitudinallyextendingeccentric bosses having curved surfaces of gradually-increasing radii, anut provided with a at bearing-surface, adapted to be received upon thethreaded portion of the bolt, and a locking device having an opening forthe reception of the shank of the bolt, the Wallof said opening beingformed with a series of inclined curved surfaces adapted to conform toand ride upon the eccentric surfaces of the bosses and to permit alimited movement between said surfaces when the parts are moved in onedirection, the said locking device being also provided with an engagingportion extending at an angle thereto and adapted to overlie and contactwith the bearing-surface of the nut, substantially as described.

In testimony whereof I have signed my name to this specicat-ion in thepresence of two subscribing witnesses.

EDWARD A. BLANTON, JR.

Witnesses:

' A. L. BOLKENKAMP, E. S. l-l. BLANTON.

